The Raspberry Pi is an inexpensive ARM7-based single-board computer that runs Linux. Using it, together with an almost-equally-inexpensive GPS receiver module from Adafruit Industries, I was able to set up a reasonably good NTP server for my home network. While the hardware side was almost ridiculously easy, the software required a bit of effort, including building a custom kernel and building ntpd from sources. Full details after the jump.